•iw; MODERN BUTTER MAKING. 



68. To find the number of pounds of starter to 

 be added to cream, when the per cent of starter is 

 known. 



Problem: 20% of starter is to be added to 3,080 

 lbs. of cream. How many pounds of starter will it 

 require : 



Rule: Multiply the cream pounds by the per cent 

 of starter and divide the result by 100, The quotient 

 will be the number of pounds of starter required. 



Solution: 3,080X20=61,600; 61,600^100=616. 

 Ans. 



Explanation: By adding 20 per. cent of starter we 

 add 20 lbs. to every hundred pounds of cream. 

 Therefore we must add as many times 20 lbs. as 

 there are hundreds in the amount of cream (3,080), 

 or 616 lbs. 



Problems for Practice. 



How many pounds of starter are required when : 



1. 10% of starter is to be added to 2,.570 lbs. 

 cream. Answer, 257 lbs. 



2. 15% of starter is to be added to 3,800 lbs. 

 cream. Answer, 570 lbs. 



3. 25% of starter is to be added to 4,800 lbs. 

 cream. Answer, 1,200 lbs. 



4. 30% of starter is to be added to 5,780 lbs. 

 cream. Answer, 1,734 lbs. 



5. 50% of starter is to be added to 8,500 lbs. 

 cream. Answer, 4,250 lbs. 



69. To find the per cent of starter added when 

 any quantity of starter was added to any quantity 

 of cream. 



